420515501 has 12 divisors (see below), whose sum is σ = 490425948. Its totient is φ = 359517312.

The previous prime is 420515497. The next prime is 420515507. The reversal of 420515501 is 105515024.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 173554276 + 246961225 = 13174^2 + 15715^2 .

It is not a de Polignac number, because 420515501 - 2² = 420515497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420515507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8645 + ... + 30261.

It is an arithmetic number, because the mean of its divisors is an integer number (40868829).

Almost surely, 2^420515501 is an apocalyptic number.

It is an amenable number.

420515501 is a deficient number, since it is larger than the sum of its proper divisors (69910447).

420515501 is a wasteful number, since it uses less digits than its factorization.

420515501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22028 (or 22021 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 420515501 is about 20506.4746116928. The cubic root of 420515501 is about 749.1935040261.

The spelling of 420515501 in words is "four hundred twenty million, five hundred fifteen thousand, five hundred one".